Polar Clouds and Climate
Polar clouds and radiation in satellite observations, reanalyses, and climate models
... Abstract Clouds play a pivotal role in the surface energy budget of the polar ...simulated clouds and radiation over both polar ice sheets and oceans in state-of-the-art atmospheric reanalyses ...
10
Dynamics of Resolved Polar Clouds
... in polar cloud feedbacks calls for process understanding of cloud response to climate ...liquid clouds in the reference climate is consistent with observations, mainly with maximum low cloud ...
115
Quantifying climate feedbacks in polar regions
... In polar regions, the presence of different phases of water implies that many feedback parameters display a particularly strong dependence on the state of the system near the freezing point and are thus highly ...
13
Toward autonomous surface-based infrared remote sensing of polar clouds: cloud-height retrievals
... Abstract. Polar regions are characterized by their remote- ness, making measurements challenging, but an improved knowledge of clouds and radiation is necessary to under- stand polar climate ...
19
Simulation of polar stratospheric clouds in the chemistry-climate-model EMAC via the submodel PSC
... Abstract. The submodel PSC of the ECHAM5/MESSy At- mospheric Chemistry model (EMAC) has been developed to simulate the main types of polar stratospheric clouds (PSC). The parameterisation of the supercooled ...
14
Maintenance of polar stratospheric clouds in a moist stratosphere
... while climate prediction models typically use empirically designed cirrus parameterizations derived from tropospheric observations to predict stratospheric cloud properties as ...
10
Maintenance of polar stratospheric clouds in a moist stratosphere
... while climate prediction models typically use empirically designed cirrus parameterizations derived from tropospheric observations to predict stratospheric cloud properties as ...
10
Polar stratospheric clouds over western Europe
... they may exhibit the splendid iridescence from which they owe their name (Figure 1). As the temperature in the NH strato- sphere is typically ten degrees above the –78 °C threshold for PSC formation (Climate ...
6
Observation of Polar Stratospheric Clouds down to the Mediterranean coast
... over polar re- gions could have decreased in the last decades in response to ozone depletion and to increases in greenhouse gases concen- ...to climate change is not directly re- lated to the observed PSC ...
8
Impact of the January 2012 solar proton event on polar mesospheric clouds
... Community Climate Model to determine the impact of the 23 – 30 January 2012 solar proton event (SPE) on polar mesospheric clouds (PMCs) and mesospheric water ...
9
Understanding the Effects of Polar Mesospheric Clouds on the Environment of the Upper Mesosphere and Lower Thermosphere
... Figure 2. Comparison of SABER H variation (top row) for 70 ∘ N and 70 ∘ S at .0006 hPa (near 94 km) with WACCM (bottom row). The y axes are mixing ratio. For the SABER data, 12 years of data are shown (plus symbols); the ...
15
High Resolution Dynamics Limb Sounder observations of polar stratospheric clouds and subvisible cirrus
... Cirrus near the tropopause plays an important role in the processes that dehydrate the upper troposphere and lower stratosphere (UT/LS) [Jensen et al., 2001; Jensen and Pfister, 2004], and influence the radiative balance ...
17
Radiosonde stratospheric temperatures at Dumont d'Urville (Antarctica): trends and link with polar stratospheric clouds
... to Polar Stratospheric Cloud (PSC) trends in Antarc- tica based on the only continuous 20 years database of PSC lidar ...and climate evolution in ...
13
Radiosonde stratospheric temperatures at Dumont d'Urville (Antarctica): trends and link with polar stratospheric clouds
... to Polar Stratospheric Cloud (PSC) trends in Antarc- tica based on the only continuous 20 years database of PSC lidar ...and climate evolution in ...
15
Widespread polar stratospheric ice clouds in the 2015-2016 Arctic winter - implications for ice nucleation
... von Hobe, M., Bekki, S., Borrmann, S., Cairo, F., D’Amato, F., Di Donfrancesco, G., Dornbrack, A., Ebersoldt, A., Ebert, M., Emde, C., Engel, I., Ern, M., Frey, W., Genco, S., Griessbach, S., Grooss, J. U., Gulde, T., ...
19
The Polar Climate Zones
... The Polar Climate Zones How cold is it in the polar climate? Polar areas are the coldest of all the major climate ...long polar nights temperatures can fall to extremely ...
6
ANGEO - Occurrence of polar stratospheric clouds at Kiruna
... Dierent features, such as impact of tropospheric clouds, distant PSCs and varying absorptions, should instead be recognized by a careful classi®cation of CI plots. This, however, requires information on the ...
6
Airborne lidar studies of Arctic polar stratospheric clouds.
... Initial correlations between satellite measurements and theoretical PSC optical properties indicated that the clouds likely form by the deposition of water vapor on[r] ...
242
Polar climate change as manifest in atmospheric circulation
... A ubiquitous aspect of the polar and sub-polar regions of both hemispheres is the presence of many synoptic systems. These play a central role in transporting heat and moisture from the midlatitudes into ...
13
A condensed mass advection based model of liquid polar stratospheric clouds
... The particle distribution is described using a full-stationary size structure, which fixes the radius of each size bin, while particle growth is treated as advection of mass between size[r] ...
10